Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.48: Poster

Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C

Thin film growth of binary alloys — •Mario Einax¹, Wolfgang Dieterich², and Philipp Maass¹ — ¹Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany — ²Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany

We investigate several growth stages of binary alloys, formed by co-deposition of A and B atoms on a flat substrate. We show that several so far unknown features emerge under co-deposition of two kinds of atoms: (i) Novel scaling relations for the density of stable islands in terms of the incoming fluxes, adatom diffusion coefficients and binding energies [1]. (ii) Perpendicular magnetic anisotropy (PMA) in a certain temperature window as a result of a competition of shape and segregation effects [2]. (iii) Increase of structural anisotropy and PMA upon application of a strong magnetic field during growth. This latter feature is suggested by calculations based on Landau theory and can be confirmed by kinetic Monte Carlo simulations [3].

[1]

M. Einax et al., Phys. Rev. Lett. 99, 016106 (2007).

[2]

S. Heinrichs et al., Phys. Rev. B 75, 085437 (2007).

[3]

M. Einax et al., J. Phys. Condens. Matter 19, 086227 (2007); M. Einax et al., Mat. Sci. Eng. C 27, 1325 (2007).